A teenage girl rounds the corner as the vampires are in the middle of screaming and crumbling into dust.

She - stares.

"Detect Evil," he says grumpily.

Not evil!

"Uh," says the girl. "Are you guys okay?"

"We're fine," he says, putting his holy symbol away and tapping his friend on the shoulder. "Unless there's a lot more of them, in which case it'd be good to know if it's permitted to put up a house within city limits."

"Nnnno. No there are not a lot more of them and no you cannot erect a house without a permit. What did you do?"

- if she's never seen the effects of Channel Energy on undead before and yet isn't surprised at all about the undead then conceivably they're in some place where good clerics are not allowed, or otherwise subject to some unfriendly selection. "They ambushed us," he says cautiously.

"No, no, I got that, I meant the part where you made them all go poof. All at once."

"I have a spell. It doesn't always work quite that dramatically."

"I see. Uh. Who are you guys?"

"I'm Fazil. This is Mahdi, and this is Hagan. We're from Osirion, but the man we spoke to at the Methodist temple didn't know where that was."

She puzzles over this for a few seconds.

" - how did you get here."

"We paid for a plane shift home from the elemental plane of Earth. It's possible that something went wrong by accident, or that we were deliberately sent to the wrong place."

" - so you guys are from, like, a different dimension?"

"That's our best guess."

"That's so cool! - sorry. Uh, d'you think you could wait here for a few minutes while my friend drives over?"

This is kinda suspicious. 

They glance at each other. 

"Why're you out at night? Seems like this city has a bit of an undead problem."

"Yes. Yes it does. I am patrolling for vampires. - well actually technically I was going home from school, but now I'm patrolling for vampires."

"This city has women patrol for vampires? Alone?"

"Um. I guess empirically yes? Although I don't really work for the city or anything."

"Who do you work for?"

She considers this.

"...me, I guess?"

" - I see."

"I realize that probably sounds very silly if you don't know what a vampire slayer is. Or even if you do. Um. I work in tandem with the Council of Watchers and the US Government, but neither of them, like, pays me, or anything? But I think you should stay until my friend gets here, we might be able to get you home or something."

"Alarm," he says quietly.

"All right, we'll stay."